The molecular analysis of biomarkers in oncology is rapidly advancing, but the incorporation of new molecular tests into clinical practice will require a greater understanding of the genetic changes that drive malignancy, the assays used to measure the resulting phenotypes and genotypes, and the regulatory processes that new molecular biomarkers must face to be accepted for clinical use. To address these issues and provide an overview of current molecular testing in 6 major malignancies, including glioma, breast cancer, colon cancer, lung cancer, prostate cancer, and acute myelogenous leukemia, an NCCN Task Force was convened on the topic of evaluating the clinical utility of tumor markers in oncology. The output of this meeting, contained within this report, describes the ways biomarkers have been developed and used; defines common terminology, including prognostic, predictive, and companion diagnostic markers, and analytic validity, clinical validity, and clinical utility; and proposes the use of a combination level of evidence score to aid in the evaluation of novel biomarker tests as they arise. The current state of regulatory oversight and anticipated changes in the regulation of molecular testing are also addressed.
Phillip G. Febbo, Marc Ladanyi, Kenneth D. Aldape, Angelo M. De Marzo, M. Elizabeth Hammond, Daniel F. Hayes, A. John Iafrate, R. Kate Kelley, Guido Marcucci, Shuji Ogino, William Pao, Dennis C. Sgroi, and Marian L. Birkeland
Alan P. Venook, Maria E. Arcila, Al B. Benson III, Donald A. Berry, David Ross Camidge, Robert W. Carlson, Toni K. Choueiri, Valerie Guild, Gregory P. Kalemkerian, Razelle Kurzrock, Christine M. Lovly, Amy E. McKee, Robert J. Morgan, Anthony J. Olszanski, Mary W. Redman, Vered Stearns, Joan McClure, and Marian L. Birkeland
Defining treatment-susceptible or -resistant populations of patients with cancer through the use of genetically defined biomarkers has revolutionized cancer care in recent years for some disease/patient groups. Research continues to show that histologically defined diseases are diverse in their expression of unique mutations or other genetic alterations, however, which presents opportunities for the development of personalized cancer treatments, but increased difficulty in testing these therapies, because potential patient populations are divided into ever smaller numbers. To address some of the growing challenges in biomarker development and clinical trial design, NCCN assembled a group of experts across specialties and solid tumor disease types to begin to define the problems and to consider alternate ways of designing clinical trials in the era of multiple biomarkers and targeted therapies. Results from that discussion are presented, focusing on issues of clinical trial design from the perspective of statisticians, clinical researchers, regulators, pathologists, and information developers.